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Similar to the notorius Weeaboo, a Gagaboo is one who is obsessed with the horror that is Lady Gaga, and are brainwashed by her bullshit. However, instead of speaking wapanese, they constantly speak in the "future tense" and believe they are better than most regular, sane people. Don't bother argueing with them. They're not wrong, they're born that way.
He would not shut up about the Monster Ball on HBO. What a Gagaboo.
by brassfox June 23, 2011
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